WiFi-Bluetooth LE PLCs Industrial Shields WiFi-Bluetooth LE PLCs are an integrated module consisting of a single 2.4GHz WiFi and Bluetooth combo chip, designed with the TSMC ultra-low-power 40nm technology. The WiFi-Bluetooth LE PLCs are designed to achieve the best power and RF performance. This allows robustness, versatility, and reliability in a wide variety of applications and power scenarios.